Dar, What is your point?

Can you set the engine at a rich medium rpm setting without four stroking? (and go by the book)
I can't, unless I use 25% nitro.
Example. a 3,5cc engine determined to run at 16,000 static, set for 8000 - 9000 rpm running in on a MA 8x6 prop. It is four stroking when at a rich mixture. When not, it is way too lean. I need about two 50 cc tanks to get the engine to best rpm. After that, I fly (MA 9x4 prop), and try to rev up the engine as high as possible, diving the plane etc.
This procedure gave me excellent results for competition engines, so I do think the manual meant just that.

Other ABC engines I run in full bore, just rich off peak, which seems best. Not MVVS though. They use a different metallurgy; I still have to ask just what.